My biggest takeaway from the book is that inflation is driven not so much by macroeconomic factors (labour, demand, commodity prices etc.), but rather is a psychological phenomenon. The health of any financial system is based on the trust of its participants in that system and its regulator. That trust takes time to build, and once it is lost, it is challenging to restore it. I think that a period of falling interest rates over the past 30+ years has been accompanied by a strong belief in the general soundness of the financial system in key markets, particularly the US.
But things are likely to be changing now. The train, probably, has already left the station. Falling confidence and rising expectations of a continued rise in prices (regardless of a particular reason, which could be a fiscal stimulus, supply bottlenecks, labour shortage, logistics etc.) are the key ingredients for higher inflation in the future.
It is, of course, not a forecast that I would like to make. And this is not the forecast made by Paul Volcker in his book. Warren Buffett has taught us not to focus too much on macro indicators and look at individual businesses instead. But it is important to note that he gave his advice not because GDP growth, inflation and interest rates do not matter for your stock returns, but because he does not believe it is possible to predict it. In fact, having seen many periods of high inflation in his life (unlike many market participants today), he even wrote an article (see '
How Inflation Swindles the Equity Investor').
What else makes me believe that the inflation trajectory has changed is Volcker's review of his own experience of fighting the opposition to raising rates which he faced from other parts of the US government and various industry groups. Interestingly, Volcker did not just raise rates in lockstep with inflation but tried to be ahead of the curve raising rates by more than was formally needed (to 20% in June 1981 while inflation peaked at 14.8% in March 1980). Higher rates pushed the economy into a recession. The scale of protests was quite wide (as recorded by Volcker):